Fantastic part! Super Mounting Clamp (SMC) for 4" PVC pipe. Rated for up to 180#s holding. UV resistant, suitable for outdoor use. Single screw hole down in the center. Just push the pvc pipe (sch 40/80/class 200/class 315, etc) into the clamp and it snaps closed. When pipe is properly snapped in place it will be spaced about 1-1/2" above the mounting surface. (Outside of pipe to mounting surface.) Clic Clamps Made in Switzerland.